Straightway valve.



UNI-TED STATES Patented July 14, 1903.

PATENT OFFICE.

HALF TO WILLIAM J. MATZ, OF POTTSVILLE, PENNSYLVANIA.

STRAIG HTWAY VALVE.

SPECIFICATION forming part of Letters Patent No. 733,905, dated. July14, 1903.

Application filed April 14, 1903. Serial No. 152,488. (No model.)

To a/ZZ whom t may concern:

Be it known that I, EDWARD M. ERDMAN, a citizen of the United States,residing at Pottsville, in the county of Schuylkill and State ofPennsylvania, have invented new and useful Improvements in StraightwayValves, of which the following is a specification.

This invention relates to straightway valves; and its object is toprovide a valve of this class which will be simple in construction, canbe easily opened and closed, can be locked in either position so lthatit cannot be accidentally changed, and in which a uidtight closure canbe produced. These objects are effected by the construction hereinafterset forth, which consists, in brief, of a straightway valve having aturning plug containing a transverse passage-way for the Huid andcarrying two loose` segments for closing the admission and dischargeopenings of the valve-casing and providedwith wedge-shaped ribs ttingsimilar grooves in the plug and a screw-threaded sleeve on thevalve-stem meshing with threads in the neck of the valve-casing andVswiveled into the plug, so that an angular movement bf said sleeve willmove the plug lengthwise and cause it to force the segments tightlyagainst the walls of the casing.

In the accompanying drawings, Figure l is a side elevation of astraightway valve embodying my invention and partly broken away. Fig. 2is a top plan view. Fig. 3 is a longitudinal section on the line 3 5,Fig. 2, showing the valve closed and unlocked. Fig. tis a similarsection showing-the valve locked. Fig. 5 is a transverse section on theline 5 5, Fig. 11. Fig. 6 is a perspective view of one of the segments.

The valve-casing has a cylindrical body 1, provided with diametricallyopposite inlet and outlet openings 2 3, The bottom of the casing isclosed by a at head 4:, secured by screws 5 and preferably having acentral socket 6 for the pivot 7 of the turning plug 8, which has aneasy fit in the body of the casing and is provided with a transversepassage-way 9, adapted to register with the openings 2 3 when the valveis open. In each side of the plug between the ends of the passage-way 9is a shallow recess 10 to receive a loose segment 1l, which is widerthan the openings 2 3, so that when the valve is `closed said segmentswill overlap said openings at each side, as shown in Fig. 5. On the backof each segment is a rib 12, having its edge inclined. The ribs tit insimilarly-inclined grooves in the plug, so that the portion of the plu gbetween said grooves is wedgeshaped in section. The segments fit snuglyat top and bottom against the upper head 13 and the lower head 4c of thecasing; but the plug plug and segments can be easily turned. The

plug has a stem 14, projecting through the head 13 and provided with ahandle 15. A

4stop-stud 16 projects through the head 13 into a groove 17 in the topof the plug and concentric with the axis thereof, the length of thegroovel being a quadrant, so that the plug can be turned just ninetydegrees in order to effect a complete opening or closing thereof.

Surrounding the stem is a sleeve 18, having at its lower end a liange19, which rests on the top of the'plug and is retained there by a ring20, secured to said plug and having a Iiange 21 overlapping the ange onthe sleeve. This construction acts like a swivel and permits the sleeveto be rotated independently of the stem. The fiange 19 and ring 2O arepreferably received in an annular recess in the top of the plug. Theexterior of the sleeve vis provided with screwthreads 22, which mesh4with screw-threads on the inside of a neck 23, rising from the head 13.Above `the neck the sleeve is provided with a handle 24, by which it canbe rotated. A gland 25 is screwed into the upper end of the neck, and asimilar gland 26 is screwed into the upper end of the sleeve to makefluid-tight joints around the sleeve and stem by means of the'packing27,'which said glands compress.

The operation is as follows: When the parts stand as shown in Figs. 1,2, and 3, the valve is closed, but the plug is free to turn easily. Tolock it, the handle of the sleeve is turned IOO to the dotted positionin Fig. 2, which forces down the plug and wedges the segments tightlyagainst the casing, as shown in Figs. 4 and 5. Owing to the greatfriction thus produced it is then impossible to turn the plug, and thusthe parts are effectually locked against accidental movement. By turningthe sleeve-handle back to the position shown in Figs. 1,2, and 3 theplug is raised, the segments released, and the valve can be opened bygiving the plug-handle a quarter-turn to the right in Fig. 2. Ifdesired, the valve can be locked in this position by screwing the sleevedown again. Y

I-Iaving described my invention, what I claim isl. In a straightwayvalve, the combination with a turning plug and its stem, of loosesegments carried by said plug, inclined faces between said plug andsegments, and a screwthreaded sleeve surrounding said stern and swiveledto said plug.

2. In a straightway valve, the combination lwith a turning plug and itsstem, of loose segments carried by said plug, inclined faces betweensaid plug and segments, a screw-threaded sleeve surrounding said stemand having a flange, and a ring secured to said plug and engaging withsaid flange.

3. In a straightway valve, the combination with a turning plug and itsstem, of loose segments carried by said plug, inclined faces betweensaid plug and segments, a screw-threaded sleeve surrounding said stemand having a flange entering a recess in the top of said plug, and aring screwed into said recess and having a ange overlapping the flangeon the sleeve.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

EDVARD M. ERDMAN.

Witnesses:

FRANK LITTLE, WM. W. NEWELL.

